Clarence sechrist



C. SECHRISTK FLUID MOTOR.

APPLICATION FILED SEPT. 16. 1920.

Patented June 13, 1922.

UNITED STATES CLARENCE SECHRIS'I, OF YORK, PENNSYLVANIA.

FLUID MOTOR.

Specification of Letters Patent.

Patented June 13, 1922.

Application filed September 16, 1920. Serial No. 410,890.

To all whom it may concern:

Be it known that I, CLARENCE SEoHRIs'r, a citizen of the United States of America, residing at York, in the county of York and State of Pennsylvania, have invented certainnew and useful Improvements in Fluid Motors, of which the following is a specifi cation.

My invention relates to fluid motors, and particularly to the type in which fluid acts on buckets placed on the periphery of a rotor.

An object of my invention is the production of a motor which is compact and neat in appearance; which may be attached to water faucets such as are used ordinarily on city water mains; and which has a sure and rapid rotationof the rotor, resulting in a high degree of efficiency of the motor.

A further object of my invention is the construction of a motor which will use a relatively very small quantity of water in proportion to the power developed.

A still further object of my invention is the construction of novel and efficient buckets and also of means to bring thefluid in contact with the buckets in the most effective manner.

Another object of my invention is the construction of a casing for the motor which is air tight except where air inlets are placed at certain places in the casing.-

These and further objects of my invention will appear from the description and will be pointed out in the claims. One embodiment of my invention is illustrated in the accompanying drawings, in which.

Figure 1 is a front elevation of the motor, showing the connection with a water faucet and the conventional fly wheels and belt pulley;

Figure 2 is a see-tion on the line 2-2 of Figure 1, with the rotor in elevation except a small part which is broken away to show the shape of the buckets;

Figure 3 is a front elevation of the rotor, showing threerbuckets;

Figure 1 is a fragmentary view of the casing looked at in the direction of the arrow placed on Figure 2; and

Fi -ure .5 is a bottom plan view of a modified form of nozzle showing the inlet tube in section.

The casing 1 consists of two equal parts 2 and?) which are attached together by any desirable means, such as screws 4. The parts of the motor are so constructed that when secured together the casing is air tight except as indicated by openings therein. An axle 5 journaled in bearings 6, which bearings may be ball bearings, passes through the center of the casing. Fly wheels 7 and 8 may be placed on the axle, as indicated, and a belt pulley 9 may be attached to the axle by any of the usual means, such as a set screw 9 The axle is lubricated by means of cups 10 and 11, in accordance with the well-known construction of such oil cups. Attached to the axle 5 is a disc rotor 12 which has buckets 13 integral with thecircumferentially extending flange on the rotor. These buckets will be hereinafter described in detail. I

The motor is secured to a water faucet by means of a screw threaded thimble 1 1 at: tached to an inlet tube 15 which is of the same inside diameter throughout its length. The inlet tube is screw threaded into an extended or projecting ,part 1 of the casing 1. lVithin this tube is a nozzle 16 extending from the top of the inlet tube to the bottom thereof and decreasing in size from the top to the bottom. This nozzle may be made of two parts 16 and 16 screw threaded together. The upper part 16 may be of brass or other metal, while the lower part 16 may be made of glass or other water resisting ma terial. The size of this inlet tube will depend on the size of the rotor. Below the inlet tube within the casing is an opening 17 0f the same diameter as the inlet tube. Extending from this opening 17 is an opening 18 which is approximately one-half of the, diameter of the opening below the inlet tube. This opening 18 to the periphery of the rotor has a delivery part of approximately the same diameter as the distance between the top of the front of one bucket and the top of the rear of the next preceding bucket. The casing is open around the rotor except as indicated at 19, at which point both sides of the casing are closed by blocks. It will further be noted that lugs 20 extend a suflicient distance below the lower opening 18 to enclose the side openings between two buckets.

These lugs 20 are integral with the blocks 19'and are an extension thereof. The lugs are spaced a sufficient distance from the walls of the casing to allow proper action of the vents 22 and 23, and just a sufficient distance apart, as indicated above, to per mit the rotor to turn freely between the lugs and the blocks.

Air vents which may be constructed so that they may be varied. in size are placed within the motor casing 1. The upper vent 21 is directly above the center of the rotor. The two lower vents 22 and 23 are on either side of the casing. Air vents 24; and 25 are also placed on opposite sides of the inlet tube 15, as indicated.

An opening 26 permits the fluid to pass out of the motor. The motor may be attached to a wall or other holding means by any means such as a bracket 27 integral with the motor casing and in which bolts or screws, not shown, may be inserted.

The buckets designated as a whole by 13 are V shaped viewed from the top. The front edge 13* is sharp and slightly concave. The top edge 13" is beveled from both upper edges, resulting in a sharp edge. The rear edge 13 of each. side of each bucket is beveled. from the front, making a sharp edge which fits close to the lugs 20. The width of the space 13 between the bottoms of adjacent buckets is about one-third. of the width of the space between the top of the front edge 13 and the top of the front edge of thenext adjacent bucket. The width of the space 13 between the bottoms of adjacent buckets is approximately one-half of the width of the space between the top of the rear edge 13 of a bucket and the top of the side of the next bucket to the rear. These proportions are due to the gradual thickening of the walls of a bucket from the top to the bottom at the front of a bucket and to the angle at which the rear part of the buckets is placed.

In Figure is shown a modified form of.

nozzle 16 Instead of the opening from the nozzle being circular as shown in 16 it may be slotted as shown at 16. This form of opening is preferable for heavy wheels as it spreads the water across the buckets.

The motor may be made of any suitable material such as aluminum, bronze, cast iron, or steel.

The size of the rotor and the number of buckets thereon will depend on the size of the stream of fluid and the pressure under which it reaches the rotor. If the pressure is from 60 to 80 pounds and the diameter of the stream at the inlet is about five-eighths of an inch, the opening from the nozzle should be about one-sixteenth or threethirtyseconds of an inch in diameter. With this pressure I find it is satisfactory to use a rotor six and three-fourths inches in. diameter and to place about twenty-three buckets on its circumference. A motor made according to my invention of the size above specified will make 2200 revolutions per minute when fed with fluid as above stated. I have found that the air inlets in the easing for a motor of the size described should be about one-fourth of an inch in diameter, and the air inlets in the inlet tube about one-half this size. These inlets, however. may be varied in size to obtain the greatest efiiciency.

The operation of my invention will be readily understood from the foregoing description. The water from the spigot passes first into the nozzle where the diameter of the opening at the bottom is about oneeighth of the size of the opening at the top. The water from the nozzle may be described as first striking the rear walls of a bucket, then the bottom of a bucket, and then' the sides and front edge of the bucket next in the rear, throwing the water against the rear walls of the front bucket. As the rotor moves, the impact stream will. continue'to the top edge of a bucket and then over the top of a bucket and again strike the rear walls of the next bucket. Two buckets, in addition to the bucket which is at the time receiving the impact of the water, will always be held full of water, for the extension blocks 20 extend far enough to cover the dis tance occupied by about three buckets. All the water flows out of the buckets by the time they have reached the outlet from the casing so that the buckets will always be dry when they reach the point of fluid impact.

I claim:

1. In a fluid motor, a rotor, and a plu-. rality of buckets on said. rotor, said buckets having a V shape in horizontal cross-section, and the front surface of each bucket making an angle to the rear surface of each bucket.

9;. In a [luid motor. a rotor, and a plu rality of buckets on said rotor. said buckets having a V shape in cross-section. andsaid buckets having the top and rear edges thereof brought to a sharp edge, and the distance between the tops of two adjacent buckets being greater than the distance between the bottoms of said buckets.

3. In a fluid motor, a rotor, and a plus rality of buckets on said rotor, said buckets having a V shape in cross-section, said buckets having the top and rear edges thereof brought to a sharp edge. said buckets having the rear surface thereof vertical and having the front surface thereof at an angle to the rear. surface thereof.

4:. In a fluid motor. a rotor, and a lurality of buckets on said rotor. said buc ets having a V shape in cross-section. and the front surface of each bucket making an angle to the rear surface thereof, said angle being greater at the front edge of each bucket than at the rear edge thereof.

5. In a fluid motor, a casing, a rotor mounted to revolve in said. casing, buckets on said rotor, means to convey fluid through said casing to said buckets, said means comprising an inlet tube and a tapered nozzle in said tube, said casing having an opening below said inlet tube of equal diameter With said tube, said casing having an opening below said opening in said casing of approximately half the diameter of said first opening'in saidvcasing, and means to hold the fluid in a bucket While the rotor is in motion, Which bucket is not being acted on by the fluid passing through the casing to 10 said buckets.

In testimony whereof I aflix my signature.

CLARENCE SEOHRIST. 

